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Finding the Fourth Proportional to 579,405.20, 869,107.80 and 529,638.80

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Solution

The fourth proportional to 579,405.20, 869,107.80 and 529,638.80 is: 794,458.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,405.20 : 869,107.80 = 529,638.80 : x
  2. Step 2: Convert to fraction form
    579,405.20/869,107.80 = 529,638.80/x
  3. Step 3: Cross multiply
    579,405.20x = 869,107.80 × 529,638.80
  4. Step 4: Simplify right side
    579,405.20x = 460,313,212,262.64
  5. Step 5: Solve for x
    x = 460,313,212,262.64/579,405.20
  6. Step 6: Final answer
    x = 794,458.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.